Multitubular boiler.



Nb. 764,369. PATENTED JULY 5, 1904.

J.B.PRUDHON.

MULTITUBULAR BOILER. APPLICATION rmm DBO. a1, 1901. no MODEL.

Patented July 5, 1904.

UNITED, STATES PATENT OFFICE.

JEAN BAPTISTE PRUDHON, OF MARSEILLES, FRANCE.

IVIULTITUBULAR BOILER.

SPECIFICATION forming part of Letters Patent No. 764,369, dated July 5,1904.

Application filed December 31,1901. Serial No. 87,947. (No model.)

To all whom it may concern.-

Be it known that I, JEAN BAPTISTE PRUD- HON, a citizen of the FrenchRepublic, residing at Marseilles, France, have invented certain new anduseful Improvements in Feedpointed out in the appended claim.

In the drawingI have illustrated by a vertical sectional View afeed-water heater and purifier constructed according to my invention.

The device is preferably located in a flue a i 6, leading from theboiler-furnace to the-stack or chimney, whereby the device will beheated by the outgoing products of combustion.

My device comprises a casing c, which may be cylindrical or other shapein cross-section and provided at the bottom with a sedimentcock f. Ipreferably construct the casing in sections, bolted together as shown.Arranged vertically within the casing is a partition cl, the ends ofwhich terminate short of the upper and lower ends of the casing, saidpartition dividing the interior of the casing into two chambers orcompartments Z a. r

The cold feed-Water isadmitted into one of the compartments of thecasing, as Z, through a pipe i,,which leads into said compartment Z andterminates in a perforated coil 70, whereby the feed-water will be fedinto said compartment in the form of fine jets.

The cover of the casing is provided with an opening 0 to give access tothe interior of the said casing. Arranged within one compartment of thecasing and preferably toward the lower end thereof is a purifyingdevice, comprising perforated plates 0, between which a filtering mediumis located, whereby the feedwater prior to being admitted to the boilerwill be filtered.

7 indicates a pipe adapted to lead from the steam-space of the boilerand into the upper end of the casing through the cover thereof, wherebythe pressure of steam within the casing will be the same as that in theboiler.-

The heated and purified feed-water is fed through a pipe it into theboiler, with which said pipe communicates. The cold feed-water admittedthrough the pipe 1: and discharged within the casing through the jets ofthe coil Ir: will be rapidly heated, and the salts, carbonates, andsulfates of lime generallycontained in water being precipitated willfall to the bottom of the casing, where they may be removed through thecock f.

What I claim as new, and desire to secure by Letters Patent, is-

A feed-water heater comprising a casing and a partition arranged thereinand dividing the same into two compartments, said partition terminatingshort of the lower end of the easing, in combination with a pipe adaptedto conduct the feed-water into one of said compartments, the inner endof said pipe terminating in a perforated coil and means communicatingwith the other compartment of the casing and adapted to conduct theheated feed-water from said casing.

In testimony that I claim the foregoing .l. have hereunto set my handthis 17th day of December, 1901.

JEAN BAPTISTE PRUDHON.

WVitnesses:

D. BERNARD, JEAN E. VINERI).

